Vehicle cooling systems and methods

ABSTRACT

A vehicle includes a chassis, a cab coupled to the chassis, an engine coupled to the chassis and positioned at least one of beneath or behind the cab, a cooling system coupled to the chassis, and a connecting shaft. The cooling system includes a fan positioned forward of a front of the cab such that the fan is spaced from the engine. The connecting shaft extends from the engine, past the front of the cab, and to the fan. The connecting shaft is positioned to facilitate driving the fan with the engine.

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.15/957,207, filed Apr. 19, 2018, which claims the benefit of U.S.Provisional Application No. 62/491,979, filed Apr. 28, 2017, and U.S.Provisional Application No. 62/491,981, filed Apr. 28, 2017, all ofwhich are incorporated herein by reference in their entireties.

BACKGROUND

A vehicle typically includes a fan positioned to provide a coolingoperation to a radiator of the vehicle. Such radiators and fans aretypically positioned immediately in front of an engine or other primemover of the vehicle. Further, the fans are typically directly coupledto the engine and the radiators are typically coupled to the chassis ofthe vehicle.

SUMMARY

One embodiment relates to a vehicle. The vehicle includes a chassis, acab coupled to the chassis, an engine coupled to the chassis andpositioned at least one of beneath or behind the cab, a cooling systemcoupled to the chassis, and a connecting shaft. The cooling systemincludes a fan positioned forward of a front of the cab such that thefan is spaced from the engine. The connecting shaft extends from theengine, past the front of the cab, and to the fan. The connecting shaftis positioned to facilitate driving the fan with the engine.

Another embodiment relates to a vehicle. The vehicle includes a chassis,a cab coupled to the chassis, an engine coupled to the chassis andpositioned at least one of beneath or behind the cab, a cooling packcoupled to the chassis, and a connecting shaft. The cooling packincludes a radiator positioned at a front end of the chassis, a fanpositioned proximate the radiator and forward of the cab, and a conduitassembly fluidly coupling the radiator to the engine to facilitateproviding a coolant between the radiator and the engine. The fan isconfigured to provide an airflow to the radiator to cool the coolantwithin the radiator. The connecting shaft extends from the engine, pastthe cab, and to the fan. The connecting shaft is positioned tofacilitate driving the fan with the engine.

Still another embodiment relates to a cooling system for a vehicle. Thecooling system includes a radiator, a fan system including a fanconfigured to provide an airflow to the radiator to cool a coolantwithin the radiator, a conduit assembly configured to fluidly couple theradiator to an engine of the vehicle to facilitate providing the coolantbetween the radiator and the engine, and a connecting shaft extendingfrom the fan system and configured to couple the fan system to theengine. The connecting shaft has a length such that (i) the fan systemis positioned forward of a front of a cab of the vehicle and (ii) theconnecting shaft extends past the front of the cab to the engine whenthe cooling system is installed on the vehicle.

The invention is capable of other embodiments and of being carried outin various ways. Alternative exemplary embodiments relate to otherfeatures and combinations of features as may be recited herein.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure will become more fully understood from the followingdetailed description, taken in conjunction with the accompanyingfigures, wherein like reference numerals refer to like elements, inwhich:

FIG. 1 is a side view of a vehicle, according to an exemplaryembodiment;

FIG. 2 is a front perspective view of a cooling pack for a prime moverof the vehicle of FIG. 1, according to an exemplary embodiment;

FIG. 3 is a front view of the cooling pack of FIG. 2, according to anexemplary embodiment;

FIG. 4 is a right view of the cooling pack of FIG. 2, according to anexemplary embodiment;

FIG. 5 is a left side view of the cooling pack of FIG. 2, according toan exemplary embodiment;

FIG. 6 is a rear view of the cooling pack of FIG. 2, according to anexemplary embodiment;

FIG. 7 is a front perspective view of a fan system coupled to a primemover of the vehicle of FIG. 1, according to an exemplary embodiment;

FIG. 8 is a side view of the fan system of FIG. 7, according to anexemplary embodiment;

FIG. 9 is a detailed front perspective view of the fan system of FIG. 7,according to an exemplary embodiment;

FIG. 10 is a detailed side view of the fan system of FIG. 7, accordingto an exemplary embodiment; and

FIG. 11 is a detailed rear view of the fan system of FIG. 7, accordingto an exemplary embodiment.

DETAILED DESCRIPTION

Before turning to the figures, which illustrate the exemplaryembodiments in detail, it should be understood that the presentapplication is not limited to the details or methodology set forth inthe description or illustrated in the figures. It should also beunderstood that the terminology is for the purpose of description onlyand should not be regarded as limiting.

Overview

According to an exemplary embodiment, a vehicle includes variouscomponents that improve performance relative to traditional systems.According to an exemplary embodiment, the vehicle of the presentdisclosure includes a cooling system (e.g., a cooling pack, etc.)positioned remotely from a prime mover (e.g., an engine, etc.) of thevehicle. The cooling system may include a radiator, a fan, a fan shroud,and conduits fluidly coupling the radiator to the engine. According toan exemplary embodiment, the engine is positioned beneath and/or atleast partially behind a front cabin of the vehicle and the coolingsystem is positioned at a front end of the chassis, ahead of the frontcabin such that an airgap (e.g., open space, a cab-tilt space, etc.) isformed between the engine and the cooling system. According to anexemplary embodiment, the fan and the fan shroud are coupled to thechassis with a common support structure such that relative movementtherebetween may be minimized and/or substantially prevented. Suchminimization facilitates reducing the tip clearance between the fan(e.g., the fins, tips, etc. of the fan) and the fan shroud, which maythereby increase the efficiency of the cooling system. According to anexemplary embodiment, the airgap and the minimized tip clearanceincreases the cooling capacity of the cooling system such that the primemover may be tuned for increased performance.

According to an exemplary embodiment, the cooling pack of the presentdisclosure includes a fan system positioned remotely from the primemover of the vehicle. The fan system may include a fan and a pulleyassembly having a plurality of pulleys and a belt. The pulley assemblymay be driven by a connecting shaft that extends between the prime moverand the pulley assembly. In other embodiments, the connecting shaft isdirectly coupled to the fan. The prime mover may thereby drive theremotely positioned fan through the connecting shaft. In someembodiments, the pulley assembly is coupled to an alternator such thatthe alternator is also positioned remotely from the engine. According toan exemplary embodiment, the engine is positioned beneath and/or atleast partially behind a front cabin of the vehicle and the fan systemand/or alternator are positioned forward of the front cabin.

According to the exemplary embodiment shown in FIG. 1, a vehicle, shownas vehicle 10, includes a chassis, shown as frame 12, that supports abody assembly including a first portion, shown as front cabin 20, and asecond portion, shown as mission equipment 30. As shown in FIG. 1, themission equipment 30 is disposed behind the front cabin 20. The frame 12of the vehicle 10 engages a plurality of tractive assemblies, shown asfront tractive assemblies 40 and rear tractive assemblies 42. Accordingto an exemplary embodiment, the vehicle 10 is a military ground vehicle.In other embodiments, the vehicle 10 is an off-road vehicle such as autility task vehicle, a recreational off-highway vehicle, an all-terrainvehicle, a sport utility vehicle, and/or still another vehicle. In yetother embodiments, the vehicle 10 is another type of off-road vehiclesuch as mining, construction, and/or farming equipment. In still otherembodiments, the vehicle 10 is an aerial truck, a rescue truck, anaircraft rescue and firefighting (ARFF) truck, a concrete mixer truck, arefuse truck, a commercial truck, a tanker, an ambulance, and/or stillanother vehicle.

According to an exemplary embodiment, the frame 12 defines alongitudinal axis. The longitudinal axis may be generally aligned with aframe rail of the frame 12 of the vehicle 10 (e.g., front-to-back,etc.). In some embodiments, the vehicle 10 includes a plurality of fronttractive assemblies 40 and/or a plurality of rear tractive assemblies 42(e.g., one, two, etc.). The front tractive assemblies 40 and/or the reartractive assemblies 42 may include brakes (e.g., disc brakes, drumbrakes, air brakes, etc.), gear reductions, steering components, wheelhubs, wheels, tires, and/or other features. As shown in FIG. 1, thefront tractive assemblies 40 and the rear tractive assemblies 42 eachinclude tractive elements, shown as wheel and tire assemblies 44. Inother embodiments, at least one of the front tractive assemblies 40 andthe rear tractive assemblies 42 include a different type of tractiveelement (e.g., a track, etc.).

According to an exemplary embodiment, the front cabin 20 includes one ormore doors, shown as doors 22, that facilitate entering and exiting aninterior of the front cabin 20. The interior of the front cabin 20 mayinclude a plurality of seats (e.g., two, three, four, five, etc.),vehicle controls, driving components (e.g., steering wheel, acceleratorpedal, brake pedal, etc.), etc. As shown in FIG. 1, the vehicle includesa hood, shown as hood 24, positioned in front of the front cabin 20 overthe front tractive assemblies 40. According to the exemplary embodimentshown in FIG. 1, the mission equipment 30 includes a cargo bodyconfigured to facilitate transporting various military equipment (e.g.,medical supplies, ammunition, weapons, missiles, personnel, etc.). Inother embodiments, the mission equipment 30 includes a truck bed or aflat bed. In some embodiments, the mission equipment 30 additionally oralternatively includes a boom lift. In another embodiment, the missionequipment 30 includes an at least partially enclosed troop transportcabin configured to facilitate transporting troops (e.g., eight, ten,twelve, twenty, etc.) with the vehicle 10.

According to an exemplary embodiment, the vehicle 10 includes apowertrain system. The powertrain system may include a primary driver(e.g., an engine, a motor, etc.), shown as prime mover 50, an energygeneration device (e.g., a generator, etc.), and/or an energy storagedevice (e.g., a battery, capacitors, ultra-capacitors, etc.)electrically coupled to the energy generation device. As shown in FIG.1, the prime mover 50 is coupled to the frame 12 of the vehicle 10beneath and/or at least partially behind the front cabin 20. In otherembodiments, the prime mover 50 is otherwise positioned (e.g.,underneath the hood 24 of the vehicle 10, etc.). The prime mover 50 mayreceive fuel (e.g., gasoline, diesel, etc.) from a fuel tank and combustthe fuel to generate mechanical energy. A transmission may receive themechanical energy and provide an output to the generator. The generatormay be configured to convert mechanical energy into electrical energythat may be stored by the energy storage device. The energy storagedevice may provide electrical energy to a motive driver to drive atleast one of the front tractive assemblies 40 and the rear tractiveassemblies 42. In some embodiments, each of the front tractiveassemblies 40 and/or the rear tractive assemblies 42 include anindividual motive driver (e.g., a motor that is electrically coupled tothe energy storage device, etc.) configured to facilitate independentlydriving each of the wheel and tire assemblies 44. In some embodiments, atransmission of the vehicle 10 is rotationally coupled to the primemover 50, a transfer case assembly, and one or more drive shafts. Theone or more drive shafts may be received by one or more differentialsconfigured to convey the rotational energy of the drive shaft to a finaldrive (e.g., half-shafts coupled to the wheel and tire assemblies 44,etc.). The final drive may then propel or moves the vehicle 10. In suchembodiments, the vehicle 10 may not include the generator and/or theenergy storage device. The powertrain of the vehicle 10 may thereby be ahybrid powertrain or a non-hybrid powertrain. According to an exemplaryembodiment, the prime mover 50 is a compression-ignition internalcombustion engine that utilizes diesel fuel. In alternative embodiments,the prime mover 50 is another type of device (e.g., spark-ignitionengine, fuel cell, electric motor, etc.) that is otherwise powered(e.g., with gasoline, compressed natural gas, hydrogen, electricity,etc.).

Cooling Pack Placement

According to the exemplary embodiment shown in FIGS. 2-6, the vehicle 10include a cooling system, shown as cooling pack 100. As shown in FIGS.1-5, the cooling pack 100 is positioned forward of the front cabin 20and the prime mover 50 such that an airgap (e.g., open space, a cab-tiltspace, etc.), shown as airgap 90, is formed between the cooling pack100, the frame 12, the prime mover 50, the hood 24, and/or the frontcabin 20. As shown in FIGS. 2-6, the cooling pack 100 includes a heatexchanger, shown as radiator 110; a cooling element, shown as fan 120; aring, shown as fan ring 130; a shroud, shown as fan shroud 140; and aplurality of fluid conduits, shown as coolant conduits 150.

As shown in FIGS. 2-5, the radiator 110 is positioned at an end of theframe 12, shown as front end 18. The radiator 110 is coupled to theframe 12 by a first support structure, shown as A-arm support 60. TheA-arm support 60 includes a first member, shown as cross member 62; asecond member, shown as right A-arm 64; and a third support member,shown as left A-arm 66. As shown in FIG. 4, the right A-arm 64 iscoupled to and extends from a first frame rail of the frame 12, shown asright frame rail 14. As shown in FIGS. 2 and 5, the left A-arm 66 iscoupled to and extends from a second frame rail, shown as left framerail 16, of the frame 12 spaced from the right frame rail 14. As shownin FIGS. 2 and 3, the cross member 62 extends between the right A-arm 64and the left A-arm 66.

As shown in FIGS. 2 and 3, the radiator 110 is positioned above (e.g.,on top of, etc.) the right frame rail 14 and the left frame rail 16 ofthe frame 12. In one embodiment, the radiator 110 is sized such thatradiator 110 extends between the right frame rail 14 and the left framerail 16. According to the exemplary embodiment shown in FIG. 2, theradiator 110 is wider than the spacing between the right frame rail 14and the left frame rail 16 (e.g., the radiator 110 extends beyond theright frame rail 14 and the left frame rail 16, etc.). In otherembodiments, the radiator 110 has a width equal to or less than thedistance between the right frame rail 14 and the left frame rail 16.According to an exemplary embodiment, the radiator 110 is configured tofacilitate cooling a fluid or coolant (e.g., engine coolant, etc.)within the radiator 110 (e.g., through a heat exchange process with airflowing therethrough, etc.). As shown in FIGS. 2,4, and 5, the coolantconduits 150 extend from the radiator 110 to the prime mover 50 tofacilitate providing the coolant between the radiator 110 and the primemover 50 (e.g., with a coolant pump, etc.).

As shown in FIGS. 4-6, the fan 120 is positioned behind and proximatethe radiator 110. According to an exemplary embodiment, the fan 120 isconfigured to draw air through the radiator 110 to cool the coolantwithin the radiator 110. According to an exemplary embodiment, the fan120 is coupled to a pulley assembly, and a drive shaft extends betweenthe pulley assembly and a power take-off (“PTO”) of the prime mover 50.The drive shaft and pulley assembly may be configured to facilitateremotely driving the fan 120 with the prime mover 50. In otherembodiments, the drive shaft is directly coupled to the fan 120.

As shown in FIGS. 4 and 5, a second support structure, shown as fansupport 70, is positioned to couple the fan 120 to the frame 12 of thevehicle 10. As shown in FIGS. 4-6, the fan support 70 includes aplurality of brackets, shown as arms 74, the extend from the fan support70. The arms 74 are positioned to couple the fan ring 130 around the fan120. As shown in FIGS. 4 and 5, the fan shroud 140 is positioned between(i) the fan 120 and the fan ring 130 and (ii) the radiator 110.According to an exemplary embodiment, the fan shroud 140 is supported bythe fan support 70.

As shown in FIG. 6, the fan 120 includes a plurality of tips or fins,shown as fan tips 122, that are spaced a distance from the fan ring 130(and the fan shroud 140), shown as fan tip clearance 124. According toan exemplary embodiment, the efficiency of the cooling pack 100 is basedat least in part on the fan tip clearance 124. By way of example, thesmaller the fan tip clearance 124 is, the greater the efficiency of thecooling pack 100 may be. According to an exemplary embodiment, thearrangement of the cooling pack 100 facilitates minimizing the fan tipclearance 124 such that efficiency of the cooling pack 100 is increased.In traditional cooling pack arrangements, a fan is coupled to the engineand a shroud is coupled to a radiator (e.g., which is separately coupledto the chassis, etc.). Such an arrangement causes increased relativemovement between the fan and the shroud (e.g., the fan moves with theengine under varying loading conditions, etc.). The increased relativemovement forces a corresponding increase in the fan tip clearance toprovide sufficient clearance for accommodating the increased relativemovement therebetween, which disadvantageously decreases the efficiencyof such a cooling pack. According to the exemplary embodiment shown inFIGS. 4-6, mounting the fan 120, the fan ring 130, and the fan shroud140 together with a single support structure (i.e., the fan support 70)proximate the radiator 110 minimizes relative movement between the fan120 and the fan shroud 140 such that the fan tip clearance 124 may beminimized, which advantageously increases the efficiency of the coolingpack 100.

Another advantage of the arrangement of the cooling pack 100 includesthe positioning of the cooling pack 100 relative to the prime mover 50such that the airgap 90 is formed therebetween. According to anexemplary embodiment, the airgap 90 facilitates increased cooling of theprime mover 50 and/or the radiator 110. Traditional cooling systemarrangements include a radiator and a fan immediately positioned infront of an engine under the hood of a vehicle. Such close positioningbetween the cooling system and the engine restricts the flow of the airthrough the fan (e.g., due to the close proximity of the fan to theengine, etc.). The cooling pack 100 of the present disclosure isadvantageously positioned ahead of the prime mover 50 such that the flowof air through the fan 120 and pushed rearward of the cooling pack 100is not restricted, but can freely flow into the airgap 90, increasingthe cooling capability of the cooling pack 100 (e.g., more air is drawnthrough the radiator 110, increased airflow to the prime mover 50,etc.).

According to an exemplary embodiment, the minimization of the fan tipclearance 124 and the formation of the airgap 90 between the coolingpack 100 and the prime mover 50 facilitate expelling increased thermalload/energy generated by the prime mover 50. The arrangement of thecooling pack 100 therefore facilitates increasing the performance of theprime mover 50 (e.g., horsepower output, torque output, etc. thereof) byfacilitating the tuning of the prime mover 50 for increased performance(e.g., which then generates increased thermal load during operationwhich is able to be removed by the cooling pack 100, etc.).

Fan Drive Arrangement

According to the exemplary embodiment shown in FIGS. 7-11, the coolingpack 100 includes a fan system, shown as fan system 200. It should beunderstood that the fan system 200 may be or include many of thecomponents of the cooling pack 100 (e.g., the fan 120, the fan ring 130,the fan shroud 140, etc.) described and shown herein in relation toFIGS. 2-6. As shown in FIGS. 7-11, the fan system 200 includes a plate,shown as support plate 210; a first support member, shown as firstpulley support 220; a second support member, shown as second pulleysupport 230; a pulley assembly supported by the first pulley support 220and the second pulley support 230; a cooling element (e.g., the fan 120,etc.), shown as fan 270, supported by the second pulley support 230(e.g., the fan support 70, etc.); and an energy generation device, shownas alternator 290. In some embodiments, the fan system 200 does notinclude the alternator 290. As shown in FIGS. 7-11, the pulley assemblyincludes a plurality of rotational members (e.g., pulleys, sheaves,wheels, etc.) including a first rotational member, shown as drive pulley250; a second rotational member, shown as fan pulley 252; a thirdrotational member, shown as first intermediate pulley 254; a fourthrotational member, shown as alternator pulley 256; a fifth rotationalmember, shown as second intermediate pulley 258; and a belt, shown aspulley belt 260. In other embodiments, the pulley assembly does notinclude each of the drive pulley 250, fan pulley 252, the firstintermediate pulley 254, the alternator pulley 256, and the secondintermediate pulley 258 (e.g., the pulley assembly does not include atleast one of the first intermediate pulley 254, the alternator pulley256, and the second intermediate pulley 258 in embodiments where the fansystem 200 does not include the alternator 290, etc.).

As shown in FIGS. 7 and 9-11, the support plate 210 extends between afirst frame rail of the frame 12, shown as right frame rail 14, and asecond frame rail of the frame 12 spaced from the right frame rail 14,shown as left frame rail 16. As shown in FIGS. 7 and 9-11, the firstpulley support 220 and the second pulley support 230 are coupled to andextend from the support plate 210, coupling the pulley assembly and thefan 270 to the support plate 210. According to an exemplary embodiment,the second pulley support 230 is a tubular member having a U-shapeprofile. According to the exemplary embodiment shown in FIGS. 7 and9-11, the support plate 210 is positioned along the frame 12 such thatthe support plate 210 is proximate the front end 18 of the frame 12 andthe vehicle 10. According to an exemplary embodiment, the fan system 200(e.g., the support plate 210, the first pulley support 220, the secondpulley support 230, the fan 270, the pulley assembly, the alternator290, etc.) is positioned forward of the prime mover 50 and the frontcabin 20 (e.g., under the hood of the vehicle 10, etc.).

As shown in FIGS. 7,10, and 11, the first pulley support 220 includes afirst interface, shown as drive interface 222. As shown in FIG. 11, thedrive interface 222 engages with (e.g., receives, etc.) a first shaft,shown as drive shaft 240, configured to rotationally couple the drivepulley 250 to the first pulley support 220. As shown in FIGS. 7 and9-11, the first pulley support 220 extends upward from the support plate210 such that the drive pulley 250 is elevated relative to the supportplate 210. As shown in FIGS. 7-11, the vehicle 10 includes a connector,shown as connecting shaft 80, having a first end, shown as first end 82,coupled to an prime mover interface, shown as prime mover power take-off(“PTO”) 52, of the prime mover 50, and an opposing second end, shown assecond end 84, coupled to the drive shaft 240 of the pulley assembly.The connecting shaft 80 is thereby positioned to extend between andcouple the prime mover 50 to the fan system 200. The connecting shaft 80may be manufactured from steel, a composite material (e.g., carbonfiber, etc.), and/or still another material. According to an exemplaryembodiment, the prime mover PTO 52 is connected to and driven by acrankshaft of the prime mover 50. The crankshaft of the prime mover 50may thereby directly drive the connecting shaft 80 and the drive pulley250. In other embodiments, the drive pulley 250 is replaced with the fan270 such that the fan 270 is directly coupled to the second end 84 ofthe connecting shaft 80 such that the fan 270 is directly driven by thecrankshaft of the prime mover 50 off of the prime mover PTO 52.

As shown in FIGS. 7-11, the second pulley support 230 includes a secondinterface, shown as fan interface 232; a third interface, shown as firstintermediate interface 234; a fourth interface, shown as alternatorinterface 236; and a fifth interface, shown as second intermediateinterface 238. As shown in FIGS. 7,8, and 10, the fan interface 232engages with (e.g., receives, etc.) a second shaft, shown as fan shaft242, configured to rotationally couple the fan pulley 252 and the fan270 to the second pulley support 230. As shown in FIGS. 7-11, the secondpulley support 230 extends upward from the support plate 210 such thatthe fan pulley 252 and the fan 270 are elevated relative to the supportplate 210. According to an exemplary embodiment, the second pulleysupport 230 elevates the fan 270 such that the fan 270 is positionedsubstantially (e.g., completely, mostly, etc.) above the right framerail 14 and the left frame rail 16. In other embodiments, the fan 270 isat least partially disposed between the right frame rail 14 and the leftframe rail 16. Positioning the fan 270 above the frame 12 may provideadditional space along the right frame rail 14 and the left frame rail16 to position various auxiliary components of the vehicle 10 along theframe 12. As shown in FIGS. 7-11, the fan system 200 includes aplurality of brackets (e.g., the arms 74, etc.), shown as support arms274, that extend from the second pulley support 230. According to anexemplary embodiment, the support arms 274 are configured to facilitatecoupling a fan ring (e.g., the fan ring 130, etc.) and/or a fan shroud(e.g., the fan shroud 140, etc.) around the fan 270.

As shown in FIGS. 7-11, the first intermediate interface 234 engageswith (e.g., receives, etc.) a third shaft, shown as first intermediateshaft 244, configured to rotationally couple the first intermediatepulley 254 to the second pulley support 230. As shown in FIGS. 8, 9, and11, the alternator interface 236 extends from the second pulley support230 (e.g., away from the front end 18, etc.) and engages with a bracket,shown as alternator bracket 294. The alternator bracket 294 extends fromthe alternator interface 236 to the alternator 290 such that thealternator bracket 294 couples the alternator 290 to the alternatorinterface 236. In some embodiments, the alternator 290 is additionallycoupled to the support plate 210 (e.g., with brackets or pads on thebottom of the alternator 290, etc.). As shown in FIG. 9, the alternator290 includes an input, shown as input shaft 292, that engages (e.g.,receives, etc.) and rotationally couples the alternator pulley 256 tothe alternator 290. As shown in FIG. 11, the second intermediateinterface 238 engages with an arm, shown as carrier arm 259. The carrierarm 259 is configured to couple the second intermediate pulley 258 tothe second intermediate interface 238, offset relative to the secondintermediate interface 238. In other embodiments, the secondintermediate pulley 258 is otherwise coupled to the second intermediateinterface 238 (e.g., the second intermediate interface 238 engages witha second intermediate shaft configured to rotationally couple the secondintermediate pulley 258 to the second pulley support 230, etc.).

As shown in FIGS. 7-11, the pulley belt 260 is configured to couple thefan pulley 252, the first intermediate pulley 254, the alternator pulley256, and the second intermediate pulley 258 to the drive pulley 250 suchthat the crankshaft of the prime mover 50 drives the fan 270 (e.g.,through the fan pulley 252, to provide a cooling operation to a radiatorof the vehicle 10, etc.) and the alternator 290 (e.g., through thealternator pulley 256, to generate electrical energy, etc.). Accordingto an exemplary embodiment, the pulley belt 260 and the pulley assemblyfacilitate mounting the fan 270 in the most optimal position to increasethe cooling capacity thereof.

According to an exemplary embodiment, the connecting shaft 80facilitates remotely positioning the fan 270 and the alternator 290ahead of the front cabin 20 towards the front end 18 of the frame 12away from the prime mover 50 (e.g., which is positioned beneath and/orbehind the front cabin 20, etc.). Remotely positioning the alternator290 ahead of the front cabin 20 may reduce the risk of contact betweenthe alternator 290 and the front cabin 20 during a blast event (e.g.,prevents the alternator 290 from becoming a projectile that engages withthe front cabin 20, etc.).

The present disclosure contemplates methods, systems, and programproducts on any machine-readable media for accomplishing variousoperations. The embodiments of the present disclosure may be implementedusing existing computer processors, or by a special purpose computerprocessor for an appropriate system, incorporated for this or anotherpurpose, or by a hardwired system. Embodiments within the scope of thepresent disclosure include program products comprising machine-readablemedia for carrying or having machine-executable instructions or datastructures stored thereon. Such machine-readable media can be anyavailable media that can be accessed by a general purpose or specialpurpose computer or other machine with a processor. By way of example,such machine-readable media can comprise RAM, ROM, EPROM, EEPROM, CD-ROMor other optical disk storage, magnetic disk storage or other magneticstorage devices, or any other medium which can be used to carry or storedesired program code in the form of machine-executable instructions ordata structures and which can be accessed by a general purpose orspecial purpose computer or other machine with a processor. Wheninformation is transferred or provided over a network or anothercommunications connection (either hardwired, wireless, or a combinationof hardwired or wireless) to a machine, the machine properly views theconnection as a machine-readable medium. Thus, any such connection isproperly termed a machine-readable medium. Combinations of the above arealso included within the scope of machine-readable media.Machine-executable instructions include, for example, instructions anddata which cause a general purpose computer, special purpose computer,or special purpose processing machines to perform a certain function orgroup of functions.

As utilized herein, the terms “approximately”, “about”, “substantially”,and similar terms are intended to have a broad meaning in harmony withthe common and accepted usage by those of ordinary skill in the art towhich the subject matter of this disclosure pertains. It should beunderstood by those of skill in the art who review this disclosure thatthese terms are intended to allow a description of certain featuresdescribed and claimed without restricting the scope of these features tothe precise numerical ranges provided. Accordingly, these terms shouldbe interpreted as indicating that insubstantial or inconsequentialmodifications or alterations of the subject matter described and claimedare considered to be within the scope of the invention as recited in theappended claims.

It should be noted that the terms “exemplary” and “example” as usedherein to describe various embodiments is intended to indicate that suchembodiments are possible examples, representations, and/or illustrationsof possible embodiments (and such term is not intended to connote thatsuch embodiments are necessarily extraordinary or superlative examples).

The terms “coupled,” “connected,” and the like, as used herein, mean thejoining of two members directly or indirectly to one another. Suchjoining may be stationary (e.g., permanent, etc.) or moveable (e.g.,removable, releasable, etc.). Such joining may be achieved with the twomembers or the two members and any additional intermediate members beingintegrally formed as a single unitary body with one another or with thetwo members or the two members and any additional intermediate membersbeing attached to one another.

References herein to the positions of elements (e.g., “top,” “bottom,”“above,” “below,” “between,” etc.) are merely used to describe theorientation of various elements in the figures. It should be noted thatthe orientation of various elements may differ according to otherexemplary embodiments, and that such variations are intended to beencompassed by the present disclosure.

Also, the term “or” is used in its inclusive sense (and not in itsexclusive sense) so that when used, for example, to connect a list ofelements, the term “or” means one, some, or all of the elements in thelist. Conjunctive language such as the phrase “at least one of X, Y, andZ,” unless specifically stated otherwise, is otherwise understood withthe context as used in general to convey that an item, term, etc. may beeither X, Y, Z, X and Y, X and Z, Y and Z, or X, Y, and Z (i.e., anycombination of X, Y, and Z). Thus, such conjunctive language is notgenerally intended to imply that certain embodiments require at leastone of X, at least one of Y, and at least one of Z to each be present,unless otherwise indicated.

It is important to note that the construction and arrangement of thesystems as shown in the exemplary embodiments is illustrative only.Although only a few embodiments of the present disclosure have beendescribed in detail, those skilled in the art who review this disclosurewill readily appreciate that many modifications are possible (e.g.,variations in sizes, dimensions, structures, shapes and proportions ofthe various elements, values of parameters, mounting arrangements, useof materials, colors, orientations, etc.) without materially departingfrom the novel teachings and advantages of the subject matter recited.For example, elements shown as integrally formed may be constructed ofmultiple parts or elements. It should be noted that the elements and/orassemblies of the components described herein may be constructed fromany of a wide variety of materials that provide sufficient strength ordurability, in any of a wide variety of colors, textures, andcombinations. Accordingly, all such modifications are intended to beincluded within the scope of the present inventions. Othersubstitutions, modifications, changes, and omissions may be made in thedesign, operating conditions, and arrangement of the preferred and otherexemplary embodiments without departing from scope of the presentdisclosure or from the spirit of the appended claims.

1. A vehicle comprising: a chassis; a cab coupled to the chassis; anengine coupled to the chassis and positioned at least one of beneath orbehind the cab; a cooling system coupled to the chassis, the coolingsystem including a fan positioned forward of a front of the cab suchthat the fan is spaced from the engine; and a connecting shaft extendingfrom the engine, past the front of the cab, and to the fan, wherein theconnecting shaft is positioned to facilitate driving the fan with theengine.
 2. The vehicle of claim 1, wherein the connecting shaft isdirectly coupled to an input of the fan such that the fan is directlydriven by the connecting shaft.
 3. The vehicle of claim 1, wherein theconnecting shaft is offset from an input of the fan such that the fan isindirectly driven by the connecting shaft.
 4. The vehicle of claim 3,further comprising a pulley assembly coupling the connecting shaft to aninput of the fan.
 5. The vehicle of claim 4, further comprising analternator positioned remote from the engine, wherein the alternator isdriven by the pulley assembly.
 6. The vehicle of claim 1, furthercomprising a support positioned to couple the fan to the chassis.
 7. Thevehicle of claim 1, wherein the cooling system includes a radiatorpositioned proximate the fan.
 8. The vehicle of claim 7, wherein thecooling system includes a conduit assembly fluidly coupling the radiatorto the engine to facilitate providing coolant between the radiator andthe engine.
 9. The vehicle of claim 7, further comprising a hood havinga front end and a rear end, wherein the rear end of the hood ispositioned proximate the front of the cab, wherein the radiator ispositioned proximate the front end of the hood, and wherein an airgap ispositioned beneath the hood and at least between the cooling system andthe rear end of the hood.
 10. The vehicle of claim 7, wherein thecooling system includes a shroud positioned between the radiator and thefan, wherein the shroud and the fan are coupled to the chassis by asingle support structure.
 11. A vehicle comprising: a chassis; a cabcoupled to the chassis; an engine coupled to the chassis and positionedat least one of beneath or behind the cab; a cooling pack coupled to thechassis, the cooling pack including: a radiator positioned at a frontend of the chassis; a fan positioned proximate the radiator and forwardof the cab, the fan configured to provide an airflow to the radiator tocool a coolant within the radiator; and a conduit assembly fluidlycoupling the radiator to the engine to facilitate providing the coolantbetween the radiator and the engine; and a connecting shaft extendingfrom the engine, past the cab, and to the fan, wherein the connectingshaft is positioned to facilitate driving the fan with the engine. 12.The vehicle of claim 11, wherein the cooling pack includes a shroudpositioned between the radiator and the fan.
 13. The vehicle of claim12, wherein the shroud and the fan are coupled to the chassis by asingle support structure.
 14. The vehicle of claim 11, wherein theconnecting shaft is directly coupled to the fan.
 15. The vehicle ofclaim 11, further comprising a pulley assembly including a drive pulleydirectly coupled to the connecting shaft, a fan pulley directly coupledto the fan, and a belt coupling the drive pulley to the fan pulley. 16.The vehicle of claim 15, further comprising an alternator, wherein thepulley assembly includes an alternator pulley directly coupled to thealternator, and wherein the alternator pulley is driven by the belt. 17.A cooling system for a vehicle, the cooling system comprising: aradiator; a fan system including a fan configured to provide an airflowto the radiator to cool a coolant within the radiator; a conduitassembly configured to fluidly couple the radiator to an engine of thevehicle to facilitate providing the coolant between the radiator and theengine; and a connecting shaft extending from the fan system andconfigured to couple the fan system to the engine, wherein theconnecting shaft has a length such that (i) the fan system is positionedforward of a front of a cab of the vehicle and (ii) the connecting shaftextends past the front of the cab to the engine when the cooling systemis installed on the vehicle.
 18. The cooling system of claim 17, whereinthe connecting shaft is directly coupled to the fan.
 19. The coolingsystem of claim 17, wherein the fan system includes a pulley assemblyincluding a drive pulley directly coupled to the connecting shaft, a fanpulley directly coupled to the fan, and a belt coupling the drive pulleyto the fan pulley.
 20. The cooling system of claim 19, wherein thepulley assembly is configured to drive both the fan and an alternator ofthe vehicle.